CN108899122B - Series cooling mode of special liquid cooling cables DC + and DC-for direct current 600A charging gun - Google Patents
Series cooling mode of special liquid cooling cables DC + and DC-for direct current 600A charging gun Download PDFInfo
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- CN108899122B CN108899122B CN201810574784.7A CN201810574784A CN108899122B CN 108899122 B CN108899122 B CN 108899122B CN 201810574784 A CN201810574784 A CN 201810574784A CN 108899122 B CN108899122 B CN 108899122B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
- H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
A serial cooling mode of liquid cooling cables DC + and DC-special for a direct current 600A charging gun is characterized in that the liquid cooling modes are two liquid cooling cables DC + and DC-respectively, an independent cooling liquid channel is arranged in each liquid cooling cable, a communicating component is arranged between the two cables through a liquid cooling terminal, and a cooling loop is formed between the two cables. The invention can effectively form the circulation of the cooling liquid, further cool the soft lead in the process of circulating and flowing the cooling liquid, and finally achieve the purpose of effectively avoiding the overheating phenomenon of the charging gun and the soft lead in the charging process.
Description
Technical Field
The invention relates to the field of high-power charging piles used by new energy electric vehicles, in particular to a liquid cooling mode of liquid cooling cables DC + and DC-special for a direct current 600A charging gun of a new energy electric vehicle.
Background
With the disappearance of fuel automobiles, the accompanying gas stations will also complete the historical mission of the fuel automobiles, and instead, the fuel stations are located all over the country, and the hardware facilities of the fuel stations are high-power charging piles in the future. At present, the charging of the electric bus is not applied to a medium-power charging pile, and the technical parameters of the charging pile are 750V direct current voltage and 250A output current. The electric pile is filled with the medium power to charge the new energy bus, and three hours are needed for charging the new energy bus and filling the storage battery fully, so that the time consumption is long, and the efficiency is low. A high-power charging pile is developed at home, and the technical parameters of the high-power charging pile are 1000-1500V of direct current voltage and 600 amperes of output current. The high-power charging pile is used for charging the new energy bus, and the charging of the new energy bus with the fully charged storage battery only needs 15 minutes or less time.
At present, a power supply of a medium-power charging pile is connected with a charging gun through a dry-type integrated cable. Unlike the common cable, the dry integrated cable has two 70 square mm power lines, one 25 square mm grounding line and more than ten signal lines inside. The cable length is typically between 6 and 10 meters, and such dry integrated cables carry a maximum current of 250 amps. The high-power charging pile cannot use the dry integrated cable, and the dry integrated cable cannot bear the working current of 600 amperes. The two proposals for solving the problem are that the sectional area of the soft conductor is increased, and the sectional area of the soft conductor is properly reduced without increasing the sectional area of the soft conductor to vacate a point space which is used as a flow channel of cooling liquid and used for cooling the soft conductor in a liquid cooling mode so as to bear the heavy current of 600 amperes. Obviously, the first solution is not feasible because increasing the sectional area of the soft conductor increases the volume and weight of the dry integrated cable, which is not suitable for human engineering, and in addition, the increase of the sectional area of the soft conductor consumes more copper material. The second scheme is feasible and scientific, and the cable is light in weight because the volume of the cable is not increased. As is well known, the liquid cooling cable is connected with the charging gun, and when the electric automobile is charged, a worker holds the charging gun by one hand and pulls the cable to a proper position by the other hand. The limbs of the staff are often in contact with the cables. The liquid cooling cables DC + and DC-special for the direct current 600A charging gun of the new energy automobile are required to be lighter and better on the premise of meeting safety indexes and charging efficiency, and the diameter of the cable is smaller and better.
The common nature of known liquid cooled cables is that the cooling fluid enters at one end of the liquid cooled cable and exits at the other end of the liquid cooled cable.
If the liquid cooling cables DC + and DC-special for the direct current 600A charging gun of the new energy automobile adopt a known liquid cooling cable cooling mode, cooling liquid enters from one end of the liquid cooling cable and then flows out from the other end of the liquid cooling cable, and the cooling method is not feasible. The reason for this is that if the cooling liquid enters from one end of the liquid cooling cable and flows out from the other end, a special return pipe for the cooling liquid needs to be additionally arranged, and the cooling liquid return pipe can be arranged at only two positions, namely, the cooling liquid return pipe is suspended outside the charging gun and is arranged inside the insulating outer cover of the integrated cable. Conceivably, if the cooling liquid return pipe is suspended outside the charging gun, the cooling liquid return pipe is dragged and pulled, and is unsafe, unattractive and more impractical. If the liquid cooling return pipe is arranged in the insulating outer cover of the integrated cable, the volume and the weight of the liquid cooling cable are increased, and if the volume and the weight of the liquid cooling cable are increased, the volume and the weight are not preferable.
Disclosure of Invention
The invention provides a cooling mode of a liquid cooling cable DC + and a DC-liquid cooling channel which are specially used for a direct current 600A charging gun of a new energy automobile and can solve the problems of the disposal of a return pipe, which are the problems of the cooling mode and the method of two liquid cooling cables DC + and DC-.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a serial cooling mode of liquid cooling cables DC + and DC-special for a direct current 600A charging gun is characterized in that the liquid cooling modes are two liquid cooling cables DC + and DC-respectively, an independent cooling liquid channel is arranged in each liquid cooling cable, a communicating component is arranged between the two cables through a liquid cooling terminal, and a cooling loop is formed between the two cables.
In order to further improve the technical scheme, the liquid cooling cable cooling structure comprises a cable outer sleeve, a PE wire, a plurality of signal wires, a soft lead, an outer sheath insulating sleeve, a non-contact electrode and a liquid cooling terminal of a charging gun, wherein the PE wire, the signal wires, the soft lead, the outer sheath insulating sleeve, the non-contact electrode and the liquid cooling terminal are arranged in the cable outer sleeve, and the connecting steps are as follows:
s1, firstly, two soft leads are respectively arranged in a red insulating electrode sleeve and a black insulating electrode sleeve, the outer sheath insulating sleeve of the direct current DC + cable is red, the outer sheath insulating sleeve of the direct current DC-cable is black, and a gap between the soft leads and the outer sheath insulating sleeve is a cooling liquid channel;
s2, arranging the two groups of soft leads and the external insulated electrode sleeve together with other signal wires and PE wires in the cable jacket at the same time to form a liquid cooling cable DC + and DC-liquid cooling serial cooling integrated bus special for the high-power charging pile;
s3, connecting the two groups of soft leads and the end part of one end of the external insulating electrode sleeve in the step S2 with a non-contact electrode respectively, wherein the non-contact electrode comprises an electrode body with a cavity structure, one end of the electrode body is provided with a lead connecting port, the lead connecting port is connected with a cooling liquid channel of the liquid cooling cable, and the electrode body is also provided with a cooling liquid inlet and outlet;
s4, connecting two of the two groups of soft leads in the step S2 and the other end part of the external insulated electrode sleeve with the liquid cooling terminal of the charging gun respectively, wherein the cooling liquid channel of the two groups of soft leads is communicated with the inside of the liquid cooling terminal of the charging gun;
s5, connecting the two charging gun liquid cooling terminals through an insulating connecting pipe assembly, and communicating the internal cavities of the two charging gun liquid cooling terminals;
s6, connecting cooling liquid inlet and outlet quick connectors on cooling liquid inlet and outlet of two non-contact electrodes, wherein one liquid inlet quick connector is connected with a liquid outlet pipeline of a liquid cooling system, and the other liquid inlet quick connector is connected with a liquid return pipeline of the cooling system;
and S7, introducing cooling liquid into the cooling system, and opening the cooling liquid circulating device.
In order to further improve the technical scheme, the specific connection process of the soft lead, the external insulated electrode sleeve and the non-contact electrode in the step S3 is as follows:
a. firstly, the length of the soft lead is larger than that of the outer sheath insulating sleeve of the soft lead, then the soft lead enters from the lead connecting port and is electrically pressed on the inner wall of the electrode body;
b. wrapping the insulating electrode sleeve outside the soft lead on the outer wall of the lead connecting port, and enabling a cooling liquid channel between the insulating electrode sleeve and the soft lead to be communicated with the inside of the electrode body; then a polytetrafluoroethylene insulating washer and a sealing clamp are sleeved on the lead wire connector, the insulating washer is arranged between the contactless electrode and the sealing clamp, a jaw opening is arranged on the outer side wall of the lead wire connector, and the sealing clamp is arranged at the position, with the jaw opening, on the outer side of the contactless electrode;
c. the sealing clamp is pressed and locked on the sealing clamp, the sealing clamp is of a hollow cylindrical structure with smooth inner and outer surfaces before locking, and the sealing clamp is pressed and locked during locking, so that the sealing clamp generates deformed locking lines after being locked, and the insulated electrode sleeve is locked between the non-contact electrode and the sealing clamp.
In order to further improve the technical scheme, the specific connection process of the soft lead, the external insulated electrode sleeve and the liquid cooling terminal of the charging gun in the step S4 is as follows:
a. firstly, the length of the soft lead is larger than that of the insulated electrode sleeve, then the soft lead is stretched into the liquid cooling terminal of the charging gun and is electrically pressed on the inner wall of the hollow structure part of the charging gun;
b. wrapping the insulating electrode sleeve outside the soft lead on the outer wall of the liquid cooling terminal of the charging gun, and enabling a cooling liquid channel between the insulating electrode sleeve and the soft lead to be communicated with the interior of the liquid cooling terminal of the charging gun; then, a polytetrafluoroethylene insulating washer and a sealing clamp are sleeved on the charging gun, the insulating washer is arranged between the liquid cooling terminal and the sealing clamp, and the sealing clamp is arranged at the position, with the jaw opening, on the outer side of the liquid cooling terminal of the charging gun;
d. the sealing clamp is pressed and locked, the sealing clamp is of a hollow cylindrical structure with smooth inner and outer surfaces before locking, and the sealing clamp is pressed and locked during locking, so that locking grains which deform are generated after the sealing clamp is locked, and the insulating electrode sleeve is locked between the liquid cooling terminal of the charging gun and the sealing clamp.
In order to further improve the technical solution, in the step a of the step S3, the electrical crimping mode is a semicircular crimping mode, specifically, the soft lead is correspondingly tightened to form a structure with a semicircular cross section, the cross section of the structure is a structure with a semicircular lead and a cavity, and the semicircular structure is electrically connected with the inner wall of the electrode body or the liquid cooling terminal of the charging gun.
In order to further improve the technical scheme, the liquid cooling terminal of the charging gun comprises a liquid cooling terminal body of the charging gun, wherein the liquid cooling terminal body is of a hollow structure with one open end and one closed end; the front end of each charging gun liquid cooling terminal body is an opening wiring end correspondingly connected with the soft lead, and the tail end of each charging gun liquid cooling terminal body is a closed plug end correspondingly connected with the charging socket of the electric automobile; the outer diameters of the two charging gun liquid cooling terminal bodies are provided with outward protruding through holes communicated with the inside, and the outer ends of the two outward protruding through holesThe internal cavity of the charging gun liquid cooling terminal body is communicated through the insulating connecting pipe assembly; the outer diameter of the charging gun liquid cooling terminal body is provided with a protruding positioning piece which is used for being connected with the charging gun body and is close to the closed plug end, the outward through hole is formed in the front end of the positioning piece, and the inner ends of the outward through holes of the two charging gun liquid cooling terminal bodies are provided with 900Bent pipe, 900The bent pipe is positioned in the cavity of the corresponding charging gun liquid cooling terminal body and is communicated to the bottom of the cavity of the charging gun liquid cooling terminal body; an inner circle of one of the convex through holes is provided with an internal thread, and an outer circle of the other convex through hole is provided with an external thread;
in order to further improve the technical scheme, the insulating connecting pipe assembly comprises an insulating guide pipe, an insulating locking nut, a horn-shaped nut and a sealing ring, wherein the insulating guide pipe is of a hollow structure, the hollow part is a cooling liquid channel, annular grooves are formed in the end faces of two ends of the guide pipe, and the sealing ring is arranged in each annular groove; one end of the insulating conduit is provided with an external thread matched with the convex through hole of one of the liquid cooling terminals, and the matched part of the insulating conduit is locked by an insulating nut; the other end of the insulating conduit is arranged to be of an inverted cone structure, the internal thread of the horn nut is matched with the external thread of the other through hole in a screwing mode, and the internal conical surface of the horn nut compresses the external conical surface of the insulating conduit; the outer wall of the end of the open joint is provided with a horse tooth buckle, and the outer sheath insulating sleeve is sleeved on the horse tooth buckle through a hoop; the end part of the closed plug end is also provided with an insulating sheath; the insulating connecting pipe assembly and the two rifle cooling terminals that charge's connected mode do, at first pass through screw-thread fit with two rifle cooling terminals that charge screw up in protruding through-hole department with insulating pipe, then it is fixed through insulating lock nut and horn type nut respectively again, when fixed, it is sealed through the sealing washer.
In order to further improve the technical scheme, the liquid cooling terminal of the charging gun is of a bent structure: the end parts of the opening wiring ends of the two charging gun liquid cooling terminal bodies and the middle part of the charging gun liquid cooling terminal body are both arc-shaped bending structures, the bending angles of the two parts are consistent, and the bending directions are opposite; the two charging gun liquid cooling terminal bodies close to the end of the closed plug are communicated with the inner cavities of the two charging gun liquid cooling terminal bodies through an insulating connecting pipe assembly, and the insulating connecting pipe assembly is perpendicular to the bending planes of the two charging gun liquid cooling terminal bodies; the curvature of the liquid cooling terminal body of the charging gun is consistent with the curvature of the curved cavity of the charging gun.
In order to further improve the technical scheme, the soft wire part comprises a soft copper stranded wire and a protective net, the soft copper stranded wire penetrates through the protective net and is embedded in the protective net, and an annular cooling liquid channel is arranged between the outer sheath insulating sleeve and the protective net; the soft copper stranded wire is a stranded wire core, and the cross section of the soft copper stranded wire is 35-60 square millimeters; the multi-strand twisted wire core is formed by twisting a plurality of small-diameter tin-plated copper single wires into a small strand wire, and the small strand wires are twisted into a soft wire; the protective net is a tinned copper wire woven net.
In order to further improve the technical scheme, when one end of the soft lead is connected with the liquid cooling terminal of the charging gun, the soft copper stranded wire and the protective net are pressed on the inner wall of the liquid cooling terminal of the charging gun in a semicircular mode, and the cooling liquid channel extends to the bottom of the cavity of the liquid cooling terminal of the charging gun.
Compared with the prior art, the invention has the beneficial effects that: the cooling liquid channels of the DC + and the DC-two liquid cooling cables are connected in series and communicated in the charging gun, after the DC + and the DC-cooling liquid channels are connected in series and communicated, the cooling liquid channels of the DC + and the DC-two liquid cooling cables form an inlet loop and an outlet loop, and cooling liquid enters from an electrode of one of the DC + and the DC-two liquid cooling cables under the action of a cooling pump, passes through a soft lead of the electrode, reaches the bottom of a cavity of a liquid cooling terminal of the electrode, then passes through a connecting pipe assembly, enters a liquid cooling terminal of the other cable, passes through a soft lead of the electrode, reaches the electrode of the electrode, and returns to a cooling system for continuous cycle use. After the cooling liquid channels of the DC + and the DC-two liquid cooling cables are communicated, the cooling liquid enters from one cable and exits from the other cable, the DC + and the DC-two liquid cooling cables naturally form a cooling liquid circulation loop, and a special return pipe for the cooling liquid is not required to be arranged outside the DC + and the DC-two liquid cooling cables. Therefore, the structure of the liquid cooling cable special for the direct current 600A charging gun of the new energy automobile is more reasonable, and the manufacturability is better.
The cooling medium can be purified water, transformer oil, transformer silicon oil, fluorinated liquid, etc. Pure water can be selected as the cooling liquid in the normal temperature zone, transformer oil and fluorinated liquid can be selected as the cooling liquid in the cold zone so as to prevent the cooling liquid from freezing below the freezing point, the cooling liquid suitable for the environmental temperature is selected according to the difference of the regional climate temperature, the use cost can be reduced, and the normal work of the liquid cooling cable can be ensured.
The liquid cooling channels of the DC + and the DC-liquid cooling cables are connected in series and communicated in the charging gun, and the cooling liquid channels of the DC + and the DC-liquid cooling cables can form a circulating loop after the liquid cooling channels are communicated. The cooling liquid flows in the DC + and DC-liquid cooling cables according to a set channel, the flowing cooling liquid firstly passes through the soft lead of one liquid cooling cable to reach the bottom of the liquid cooling terminal cavity of the charging gun, then the cooling liquid enters the bottom of the liquid cooling terminal cavity of the other liquid cooling cable and returns, passes through the soft lead of the other liquid cooling cable and takes away the heat generated by the soft lead of the cable and the charging gun terminal during working.
Drawings
Fig. 1 is a schematic structural diagram of a liquid cooling cable special for a direct current 600A charging gun of a new energy automobile according to the invention;
fig. 2 is a schematic structural diagram of a liquid cooling terminal dedicated for a 600A dc charging gun.
FIG. 3 is a schematic diagram of the internal structure of one of the liquid-cooled terminals of FIG. 2.
FIG. 4 is a schematic structural view of the insulated connector assembly of FIG. 2;
FIG. 5 is a schematic view of the insulated conduit of FIG. 4;
FIG. 6 is a schematic diagram of a contactless electrode structure;
FIG. 7 is a schematic structural view of a soft wire and an outer sheath insulating sleeve;
in the figure: 1. the liquid cooling cable is insulated and covered; 2. a soft wire; 3. an outer sheath insulating sleeve; 4. 5, a liquid cooling terminal of the charging gun; 6. sealing the clamp; 7. a cooling liquid inlet and outlet quick-connection joint; 8. a polytetrafluoroethylene insulating gasket; 9. a signal line; 10. a PE line; 11. a cooling system;
201. a coolant passage; 202. soft copper stranded wire; 203. a protective net;
51. a charging gun liquid cooling terminal body; 52. a closed plug end; 53. an open terminal; 54. a positioning member; 55. a convex through opening; 56. 90 of the formula0Bending the pipe; 57. an insulated junction block assembly; 58. A threaded connector; 50. an insulating sheath; 571. an insulated conduit; 572. an insulating lock nut; 573. a trumpet-shaped nut; 574. a seal ring; 575. an annular groove.
401. An electrode body; 402. an electrode mounting hole; 403. a cooling liquid inlet and outlet; 404. a wire connection port; 406. an electrode mounting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a special liquid cooling cable DC + of direct current 600A rifle that charges and cluster cold-cooling mode of DC-, liquid cooling cable cooling structure includes cable outer tube 1 and sets up PE line 10 and a plurality of signal line 9, software wire 2, oversheath insulating sleeve 3, contactless electrode 4 and rifle liquid cooling terminal 5 that charges in cable outer tube 1, and its connection step is as follows:
s1, firstly, two soft leads 2 are respectively arranged inside a red insulating electrode sleeve 3 and a black insulating electrode sleeve 3, the outer sheath insulating sleeve 3 of the direct current DC + cable is red, the outer sheath insulating sleeve 3 of the direct current DC-cable is black, and a gap between the soft leads 2 and the outer sheath insulating sleeve 3 is a cooling liquid channel 201;
s2, arranging the two groups of soft leads 2 and the external insulated electrode sleeve 3 in the step above, together with other signal wires 9 and PE wires 10, inside the cable outer sleeve 1 to form a liquid cooling cable DC + and DC-liquid cooling serial cooling integrated bus special for the high-power charging pile;
s3, connecting the two groups of soft leads 2 and one end of the external insulated electrode sleeve 3 in the step S2 with a non-contact electrode 4 respectively, wherein the non-contact electrode comprises an electrode body 401 with a cavity structure, one end of the electrode body 401 is provided with a lead connecting port 404, the lead connecting port 404 is connected with a cooling liquid channel 201 of the liquid cooling cable, and the electrode body 401 is also provided with a cooling liquid inlet and outlet 403; the specific connection process of the soft lead 2, the external insulated electrode sleeve 3 and the non-contact electrode 4 is as follows:
a. firstly, the length of the soft lead 2 is larger than that of the outer sheath insulating sleeve 3, then the soft lead 2 enters from the lead connecting port 404 and is electrically pressed on the inner wall of the electrode body 401;
b. the insulating electrode sleeve 3 outside the soft lead 2 is wrapped on the outer wall of the lead connecting port 404, and the cooling liquid channel 201 between the insulating electrode sleeve 3 and the soft lead 2 is communicated with the inside of the electrode body 401; then a polytetrafluoroethylene insulating washer 8 and a sealing clamp 6 are sleeved on the lead connector, the insulating washer 8 is arranged between the non-contact electrode 4 and the sealing clamp 6, a jaw opening is arranged on the outer side wall of the lead connector 404, and the sealing clamp 6 is arranged at the position of the outer side of the non-contact electrode 4 with the jaw opening;
c. pressing and locking are carried out on the sealing hoop 6, the sealing hoop 6 is of a hollow cylindrical structure with smooth inner and outer surfaces before locking, pressing and locking are carried out on the sealing hoop 6 during locking, and locking lines which deform are generated after the sealing hoop 6 is locked, so that the insulated electrode sleeve 3 is locked between the non-contact electrode 4 and the sealing hoop 6.
S4, connecting the two groups of soft leads 2 in the step S2 and the other end parts of the external insulated electrode sleeve 3 with the liquid cooling terminal 5 of the charging gun respectively, wherein the cooling liquid channel 201 of the charging gun is communicated with the inside of the liquid cooling terminal 5 of the charging gun; the concrete connection process of the soft lead 2, the external insulation electrode sleeve 3 and the liquid cooling terminal 5 of the charging gun is as follows:
a. firstly, the length of the soft lead 2 is larger than that of the insulated electrode sleeve 3, then the soft lead 2 is stretched into the liquid cooling terminal 5 of the charging gun and is electrically pressed on the inner wall of the hollow structure part;
b. the insulating electrode sleeve 3 outside the soft lead 2 is wrapped on the outer wall of the charging gun liquid cooling terminal 5, and the cooling liquid channel 201 between the insulating electrode sleeve 3 and the soft lead 2 is communicated with the interior of the charging gun liquid cooling terminal 5; then, a polytetrafluoroethylene insulating washer 8 and a sealing clamp 6 are sleeved on the charging gun, the insulating washer 8 is arranged between the liquid cooling terminal 5 and the sealing clamp 6, and the sealing clamp 6 is arranged at the position, with a jaw opening, on the outer side of the liquid cooling terminal 5 of the charging gun;
c. pressing locking is carried out on the sealing hoop 6, the sealing hoop 6 is of a hollow cylindrical structure with smooth inner and outer surfaces before locking, pressing locking is carried out on the sealing hoop 6 during locking, locking lines which deform are generated after the sealing hoop 6 is locked, and the insulating electrode sleeve 3 is locked between the charging gun liquid cooling terminal 5 and the sealing hoop 6.
S5, connecting the two charging gun liquid cooling terminals 5 through the insulating connecting pipe assembly 57, and communicating the internal cavities of the two charging gun liquid cooling terminals 5;
s6, connecting cooling liquid inlet and outlet quick-connection joints 7 on cooling liquid inlet and outlet 403 of two non-contact electrodes 4, wherein one liquid inlet quick-connection joint 7 is connected with a liquid outlet pipeline of a liquid cooling system 11, and the other liquid inlet quick-connection joint 7 is connected with a liquid return pipeline of the cooling system 11;
and S7, introducing the cooling liquid into the cooling system 11, and opening the cooling liquid circulating device.
The electrical crimping mode is semicircular crimping, specifically, the soft lead 2 is correspondingly screwed to form a structure with a semicircular cross section, half of the cross section is a semicircular lead and half of the cross section is a cavity structure, and the semicircular structure part is electrically connected with the inner wall of the electrode body 401 or the charging gun liquid cooling terminal 5.
The charging gun liquid cooling terminal 5 comprises a charging gun liquid cooling terminal body 51 which is of a hollow structure with one open end and one closed end; the front end of each charging gun liquid cooling terminal body 51 is an open terminal 53 correspondingly connected with the soft lead 2, and the tail end is a closed plug end 52 correspondingly connected with an electric vehicle charging socket; the outer diameters of the two charging gun liquid cooling terminal bodies 51 are respectively provided with an outward through hole 55 communicated with the inside, and the outer ends of the two outward through holes 55 are communicated with the inner cavity of the charging gun liquid cooling terminal body 51 through an insulating connecting pipe assembly 57; the charging gun liquid coolingThe outer diameter of the terminal body 51 is provided with a positioning piece 54 which is protruded and used for being connected with the charging gun body at the position close to the closed plug end 52, the outer convex through hole 55 is arranged at the front end of the positioning piece 54, and the inner ends of the outer convex through holes 55 of the two charging gun liquid cooling terminal bodies 51 are respectively provided with 900Bends 56, 900The bent pipe 56 is positioned in the cavity of the corresponding charging gun liquid cooling terminal body 51 and is communicated to the bottom of the cavity of the charging gun liquid cooling terminal body 51; an inner circle of one of the convex through holes 55 is provided with an internal thread, and an outer circle of the other convex through hole 55 is provided with an external thread;
the insulating connecting pipe assembly 57 comprises an insulating guide pipe 571, an insulating locking nut 572, a horn-shaped nut 573 and a sealing ring 574, wherein the insulating guide pipe 571 is of a hollow structure, the hollow part is a cooling liquid channel, annular grooves 575 are formed in the end faces of two ends of the guide pipe 571, and the sealing ring 574 is arranged in the annular grooves 575; one end of the insulating conduit 571 is provided with an external thread matched with the convex through hole 55 of one of the liquid cooling terminals, and the matched part is locked by an insulating nut 572; the other end of the insulating conduit 571 is arranged to be of an inverted cone structure, the internal thread of the horn nut 573 is in screwed fit with the external thread of the other through hole 55, and the internal conical surface of the horn nut 573 compresses the external conical surface of the insulating conduit 571; the outer wall of the open joint end 53 is provided with a horse tooth buckle, and the outer sheath insulating sleeve 3 is sleeved and pressed on the horse tooth buckle through a hoop 6; the end of the closed plug end 52 is further provided with an insulating sheath 510; the insulating connecting pipe assembly 57 is connected to the two charging gun cooling terminals 5 in such a manner that the insulating guide pipe 571 is screwed to the two charging gun cooling terminals 5 through screw-fitting at the external convex through-hole 55, and then fixed by the insulating lock nut 572 and the trumpet nut 573, respectively, and sealed by the sealing ring 574 while being fixed.
The rifle liquid cooling terminal 5 that charges is the bending structure: the end parts of the opening wiring ends 53 of the two charging gun liquid cooling terminal bodies 51 and the middle part of the charging gun liquid cooling terminal bodies 51 are both arc-shaped bending structures, the bending angles of the two parts are consistent, and the bending directions are opposite; the two charging gun liquid cooling terminal bodies 51 close to the closed plug end 52 are communicated with the inner cavities of the two charging gun liquid cooling terminal bodies through an insulating connecting pipe assembly 57, and the insulating connecting pipe assembly 57 is perpendicular to the bending planes of the two charging gun liquid cooling terminal bodies 51; the curvature of the charging gun liquid cooling terminal body 51 corresponds to the curvature of the charging gun bending cavity.
The soft wire part comprises soft copper stranded wires 202 and a protective net 203, the soft copper stranded wires 202 penetrate through the protective net 203 and are embedded in the protective net 203, and an annular cooling liquid channel 201 is arranged between the outer sheath insulating sleeve 3 and the protective net 203; the soft copper stranded wire 202 is a stranded wire core with a cross section of 35-60 square millimeters; the multi-strand twisted wire core is formed by twisting a plurality of small-diameter tin-plated copper single wires into a small strand wire, and the small strand wires are twisted into a soft wire; the protective net 203 is a tin-plated copper wire woven net. When one end of the soft lead 2 is connected with the charging gun liquid cooling terminal 5, the soft copper stranded wire 202 and the protective net 203 are in semicircular crimping connection with the inner wall of the charging gun liquid cooling terminal 5, and the cooling liquid channel 201 extends to the bottom of the cavity of the charging gun liquid cooling terminal 5.
After a liquid cooling cable DC + special for a direct current 600A charging gun of a new energy automobile is connected in series and communicated with a DC-cooling liquid channel, the cooling liquid channels of the two cables form a cooling liquid inlet and outlet circulation loop, wherein the cooling liquid enters from an electrode of one liquid cooling cable, and the cooling liquid can be purified water, transformer oil, transformer silicon oil, fluorinated liquid … and the like, enters an insulating sleeve through the electrode by the quick connection of the red cable + DC, passes through a soft lead and reaches the bottom of a liquid cooling terminal cavity special for the direct current 600A charging gun. Returning the cooling liquid to the interior of the liquid-cooled terminals 900A bend pipe for passing through the insulating connecting pipe assembly and entering 90 parts of the inner cavity of the liquid cooling terminal special for the DC 600A charging gun of another liquid cooling cable0The bent pipe reaches the bottom of the inner cavity of the liquid cooling terminal special for the cable direct current 600A charging gun, flows along the cooling liquid channel of the other liquid cooling cable, passes through the soft lead of the bent pipe, finally flows out of the electrode connected with the soft lead and returns to the cooling device, so that the circulation of cooling liquid is formed, the soft lead is cooled in the circulating flowing process of the cooling liquid, and finally, the charging gun and the soft lead are effectively prevented from being overheated in the charging process.
Claims (6)
1. The utility model provides a special liquid cooling cable DC + of direct current 600A rifle that charges and cluster cold-cooling mode of DC-, characterized by: the cooling mode comprises two liquid cooling cables including DC + and DC-wherein an independent cooling liquid channel is arranged in each liquid cooling cable, an insulating connecting pipe assembly is arranged between the liquid cooling terminals of the charging gun between the two cables, and a cooling loop is formed between the two cables; the liquid cooling cable cooling structure comprises a cable outer sleeve (1), a PE wire (10) and a plurality of signal wires (9) which are arranged in the cable outer sleeve (1), a soft lead (2), an outer sheath insulating sleeve (3), a non-contact electrode (4) and a liquid cooling terminal (5) of a charging gun, and the connection steps are as follows:
s1, firstly, two soft leads (2) are respectively arranged inside red and black outer sheath insulation sleeves (3), the outer sheath insulation sleeve (3) of the direct current DC + cable is red, the outer sheath insulation sleeve (3) of the direct current DC-cable is black, and a gap between the soft leads (2) and the outer sheath insulation sleeve (3) is a cooling liquid channel (201);
s2, arranging the two groups of soft leads (2) and the outer sheath insulating sleeve (3) in the steps above, together with other signal wires (9) and PE wires (10) inside the cable outer sleeve (1) to form a direct current 600A charging gun special liquid cooling cable DC + and DC-liquid cooling serial cooling integrated bus;
s3, connecting the end parts of one end of the two groups of soft leads (2) and the outer sheath insulating sleeve (3) in the step S2 with a non-contact electrode (4) respectively, wherein the non-contact electrode comprises an electrode body (401) with a cavity structure, one end of the electrode body (401) is provided with a lead connecting port (404), the lead connecting port (404) is connected with a cooling liquid channel (201) of the liquid cooling cable, and the electrode body (401) is also provided with a cooling liquid inlet and outlet (403);
s4, connecting the two groups of soft leads (2) in the step S2 and the end part of the other end of the outer sheath insulating sleeve (3) with the liquid cooling terminal (5) of the charging gun respectively, wherein the cooling liquid channel (201) is communicated with the interior of the liquid cooling terminal (5) of the charging gun;
s5, connecting the two charging gun liquid cooling terminals (5) through an insulating connecting pipe component (57) and communicating the internal cavities of the two charging gun liquid cooling terminals (5);
s6, connecting cooling liquid inlet and outlet quick connectors (7) on cooling liquid inlet and outlet (403) of two non-contact electrodes (4), wherein one cooling liquid inlet and outlet quick connector (7) is connected with a liquid outlet pipeline of a liquid cooling system (11), and the other cooling liquid inlet and outlet quick connector (7) is connected with a liquid return pipeline of the liquid cooling system (11);
s7, introducing cooling liquid into the liquid cooling system (11), and opening the cooling liquid circulating device; the charging gun liquid cooling terminal (5) comprises a charging gun liquid cooling terminal body (51) which is of a hollow structure with one open end and one closed end; the front end of each charging gun liquid cooling terminal body (51) is an open terminal (53) correspondingly connected with the soft lead (2), and the tail end is a closed plug end (52) correspondingly connected with the charging socket of the electric automobile; outer convex through openings (55) communicated with the inside are formed in the outer diameters of the two charging gun liquid cooling terminal bodies (51), and the outer ends of the two outer convex through openings (55) are communicated with an inner cavity of the charging gun liquid cooling terminal body (51) through an insulating connecting pipe assembly (57); the charging gun liquid cooling terminal body (51) is provided with a protruding positioning piece (54) which is used for being connected with a charging gun body and is close to a closed plug end (52) on the outer diameter, a convex through hole (55) is formed in the front end of the positioning piece (54), and the inner ends of the convex through holes (55) of the two charging gun liquid cooling terminal bodies (51) are respectively provided with 900Bent pipes (56, 90)0The bent pipe (56) is positioned in the cavity of the corresponding charging gun liquid cooling terminal body (51) and is communicated to the bottom of the cavity of the charging gun liquid cooling terminal body (51); the inner circle of one convex through hole (55) is provided with an internal thread, and the outer circle of the other convex through hole (55) is provided with an external thread; the insulating connecting pipe assembly (57) comprises an insulating guide pipe (571), an insulating locking nut (572), a horn-shaped nut (573) and a sealing ring (574), wherein the insulating guide pipe (571) is of a hollow structure, the hollow part is a cooling liquid channel, annular grooves (575) are formed in the end faces of two ends of the insulating guide pipe (571), and the sealing ring (574) is arranged in each annular groove (575); one end of the insulating conduit (571) is provided with one of the insulating conduitsThe matched external thread of the convex through hole (55) of the liquid cooling terminal of the charging gun is locked at the matched position through an insulating locking nut (572); the other end of the insulating guide pipe (571) is arranged to be of an inverted cone structure, the internal thread of the horn nut (573) is in screwed fit with the external thread of the other through hole (55), and the internal conical surface of the horn nut (573) compresses the external conical surface of the insulating guide pipe (571); the outer wall of the opening wiring end (53) is provided with a horse tooth buckle, and the outer sheath insulating sleeve (3) is sleeved on the horse tooth buckle through a hoop (6); an insulating sheath (510) is arranged at the end part of the closed plug end (52); the connection mode of the insulating connecting pipe assembly (57) and the two charging gun liquid cooling terminals (5) is that firstly, an insulating guide pipe (571) is screwed with the two charging gun liquid cooling terminals (5) at an outer convex through hole (55) through threaded fit, then the insulating guide pipe and the two charging gun liquid cooling terminals are fixed through an insulating locking nut (572) and a horn-shaped nut (573), and the insulating guide pipe and the two charging gun liquid cooling terminals are sealed through a sealing ring (574) while being fixed; rifle liquid cooling terminal charges (5) are bending structure: the end parts of the opening wiring ends (53) of the two charging gun liquid cooling terminal bodies (51) and the middle part of the charging gun liquid cooling terminal bodies (51) are both arc-shaped bending structures, the bending angles of the two parts are consistent, and the bending directions are opposite; the two charging gun liquid cooling terminal bodies (51) close to the closed plug end (52) are communicated with the inner cavities of the two charging gun liquid cooling terminal bodies through an insulating connecting pipe assembly (57), and the insulating connecting pipe assembly (57) is perpendicular to the bending planes of the two charging gun liquid cooling terminal bodies (51); the curvature of the liquid cooling terminal body (51) of the charging gun is consistent with the curvature of the curved cavity of the charging gun correspondingly.
2. The serial cooling method for the liquid cooling cables DC + and DC-dedicated for the direct current 600A charging gun as claimed in claim 1, wherein: the specific connection process of the soft lead (2), the outer sheath insulating sleeve (3) and the non-contact electrode (4) in the step S3 is as follows:
a. firstly, the length of the soft lead (2) is larger than that of the outer sheath insulating sleeve (3) of the soft lead, then the soft lead (2) enters from the lead connecting port (404) and is electrically pressed on the inner wall of the electrode body (401);
b. an outer sheath insulating sleeve (3) at the outer side of the soft lead (2) is wrapped on the outer wall of the lead connecting port (404), and a cooling liquid channel (201) between the outer sheath insulating sleeve (3) and the soft lead (2) is communicated with the inside of the electrode body (401); then a polytetrafluoroethylene insulating washer (8) and a sealing clamp (6) are sleeved on the wire connector, the polytetrafluoroethylene insulating washer (8) is arranged between the non-contact electrode (4) and the sealing clamp (6), a jaw opening is arranged on the outer side wall of the wire connector (404), and the sealing clamp (6) is arranged at the position of the outer side of the non-contact electrode (4) with the jaw opening;
c. pressing and locking are carried out on the sealing hoop (6), the sealing hoop (6) is of a hollow cylindrical structure with smooth inner and outer surfaces before locking, pressing and locking are carried out on the sealing hoop (6) during locking, and locking lines which deform are generated after the sealing hoop (6) is locked, so that the outer sheath insulating sleeve (3) is locked between the non-contact electrode (4) and the sealing hoop (6).
3. The serial cooling method for the liquid cooling cables DC + and DC-dedicated for the direct current 600A charging gun as claimed in claim 1, wherein: the specific connection process of the soft lead (2), the outer sheath insulating sleeve (3) and the charging gun liquid cooling terminal (5) in the step S4 is as follows:
a. firstly, the length of the soft lead (2) is larger than that of the outer sheath insulating sleeve (3), then the soft lead (2) is stretched into the liquid cooling terminal (5) of the charging gun, and the electric property is pressed on the inner wall of the hollow structure part of the charging gun;
b. wrapping an outer sheath insulating sleeve (3) on the outer side of the soft lead (2) on the outer wall of the charging gun liquid cooling terminal (5), and enabling a cooling liquid channel (201) between the outer sheath insulating sleeve (3) and the soft lead (2) to be communicated with the interior of the charging gun liquid cooling terminal (5); then, a polytetrafluoroethylene insulating gasket (8) and a sealing clamp (6) are sleeved on the charging gun liquid cooling terminal, the polytetrafluoroethylene insulating gasket (8) is arranged between the charging gun liquid cooling terminal (5) and the sealing clamp (6), and the sealing clamp (6) is arranged at the position, with a die opening, on the outer side of the charging gun liquid cooling terminal (5);
c. pressing and locking are conducted on the sealing clamp (6), the sealing clamp (6) is of a hollow cylindrical structure with smooth inner and outer surfaces before locking, pressing and locking are conducted on the sealing clamp (6) during locking, locking lines which deform after the sealing clamp (6) is locked enable the outer sheath insulating sleeve (3) to be locked between the charging gun liquid cooling terminal (5) and the sealing clamp (6).
4. The serial cooling method for the liquid cooling cables DC + and DC-dedicated for the direct current 600A charging gun as claimed in claim 2 or 3, characterized in that: the electric compression joint adopts a semi-circular compression joint mode, specifically, a soft lead (2) is correspondingly screwed to form a structure with a semi-circular cross section, the cross section of the structure is a structure with a semi-circular lead and a semi-cavity, and the semi-circular structure part is electrically connected with the inner wall of the electrode body (401) or the liquid cooling terminal (5) of the charging gun.
5. The serial cooling method for the liquid cooling cables DC + and DC-dedicated for the direct current 600A charging gun as claimed in claim 2, wherein: the soft wire part comprises a soft copper stranded wire (202) and a protective net (203), the soft copper stranded wire (202) penetrates through the protective net and is embedded in the protective net (203), and an annular cooling liquid channel (201) is arranged between the outer sheath insulating sleeve (3) and the protective net (203); the soft copper stranded wire (202) is a stranded wire core, and the cross section of the stranded wire core is 35-60 square millimeters; the multi-strand twisted wire core is formed by twisting a plurality of small-diameter tin-plated copper single wires into a small strand wire, and the small strand wire is twisted into a wire; the protective net (203) is a tinned copper wire woven net.
6. The serial cooling method for the liquid cooling cables DC + and DC-dedicated for the DC 600A charging gun as claimed in claim 5, wherein: when one end of the soft lead (2) is connected with the liquid cooling terminal (5) of the charging gun, the soft copper stranded wire (202) and the protective net (203) are in semicircular crimping on the inner wall of the liquid cooling terminal (5) of the charging gun, and the cooling liquid channel (201) extends to the bottom of the cavity of the liquid cooling terminal (5) of the charging gun.
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| CN201810574784.7A CN108899122B (en) | 2018-06-06 | 2018-06-06 | Series cooling mode of special liquid cooling cables DC + and DC-for direct current 600A charging gun |
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| CN201810574784.7A CN108899122B (en) | 2018-06-06 | 2018-06-06 | Series cooling mode of special liquid cooling cables DC + and DC-for direct current 600A charging gun |
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| CN108899122B true CN108899122B (en) | 2020-10-20 |
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| CN109727713B (en) * | 2019-02-11 | 2023-08-18 | 洛阳正奇机械有限公司 | High-power charging pile cold-stringing cable with red copper corrugated pipe structure |
| CN109755784B (en) * | 2019-02-11 | 2024-04-05 | 洛阳正奇机械有限公司 | Liquid cooling cable electrode inner structure for high-power charging pile |
| CN110077258A (en) * | 2019-05-31 | 2019-08-02 | 南京康尼机电股份有限公司 | A kind of chipware of the charging gun with cooling passage, plug and charging gun |
| CN110289513B (en) * | 2019-07-08 | 2024-02-02 | 旭立辰新能源(东莞)有限公司 | Connecting structure of cable for charging gun and charging gun binding post |
| CN115230518B (en) * | 2021-04-23 | 2024-04-12 | 北京昇科能源科技有限责任公司 | Charging method and device for charging pile with refrigeration function |
| CN220535422U (en) * | 2021-08-05 | 2024-02-27 | 埃梯梯科能电子(深圳)有限公司 | Cooling contact terminal, cooling contact system and high-power charging system |
| CN115910464B (en) * | 2022-10-18 | 2023-08-11 | 广东天枢新能源科技有限公司 | Liquid cooling charging system for charging electric automobile |
| CN118182184A (en) * | 2024-04-19 | 2024-06-14 | 广东安特信技术有限公司 | Be used for rifle cable department seal structure that charges |
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